[Six reports](http://www.zerocarbonbritain.org/index.php/zcb-latest-report/zcb-methodology) cover the [[Zero carbon Britain 2030]] Carbon model, Power down, Renewable energy supply, Hourly energy model, Land use, Food and diets model. ##Carbon model## ##Power down## ##Renewable energy supply## ### Questions ### * How does the amount of offshore wind compare with the estimates in [[Without the hot air]]? A calculation: 530TWh/y = $ 530 \times 10^9 $ kWh/y. Assuming a population of 60 million, this corresponds to $$ \frac{530 \times 10^9}{365 \times 6 \times 10^7} = 24 kWh/day $$ per person. This can be compared to [[David MacKay|MacKay]]'s estimates of 16 kWh/day for shallow offshore wind plus 32 kWh/day for deep offshore wind. * 27 TWh a year of carbon-neutral gas is produced and used as backup, producing about 14 TWh/y of electricity. Gas turbines with about 400 TWh/y maximum capacity are needed for this. That seems like a lot of spare capacity: is this a big problem? ## Hourly energy model## The [Hourly Energy Model Methodology](http://www.zerocarbonbritain.org/index.php/zcb-latest-report/zcb-methodology/item/116) is used for assessing this plan. Also see [[Azimuth code challenges]]. ##Land use## ##Food and diets model##